Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A linear approximation solution method for voltage and reactive power optimization of distribution network

A technology of voltage reactive power optimization and linear approximation, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve problems such as low reliability

Active Publication Date: 2018-07-03
SOUTHEAST UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to overcome the disadvantage of low solution reliability when the existing distribution network voltage and reactive power optimization technology is applied to the multi-ring distribution network, the present invention proposes a linear approximation solution for the multi-ring distribution network method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A linear approximation solution method for voltage and reactive power optimization of distribution network
  • A linear approximation solution method for voltage and reactive power optimization of distribution network
  • A linear approximation solution method for voltage and reactive power optimization of distribution network

Examples

Experimental program
Comparison scheme
Effect test

example

[0129] It includes the following steps:

[0130] 1. Obtain the network parameters, initialize the number of iterations k=0, and the error limit is error. And initialize the reactive power output of each distributed power supply and capacitor bank to zero.

[0131] 2. Update the node reactive power injection and perform a power flow analysis to obtain the node voltage phase angle difference square matrix θ k And the node voltage amplitude vector U k .

[0132] 3. Establish the distribution network voltage and reactive power optimization model 1, and set it at θ=θ k ,U b = U k Linearize model 1 to model 2:

[0133] Model 1:

[0134]

[0135] Where: P 1j Is the active power flow from node 1 to node j; j∈1 indicates that node j is directly connected to node 1; U i Is the voltage amplitude of node i; θ 1j Is the voltage phase angle difference between node 1 and node j; g 1j +jb 1j =1 / r 1j +jx 1j , R 1j , X1j are the branch resistance and branch reactance of the line (1,j) respectively; S is...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention, which belongs to the optimization operation field of the power system, discloses a linear approximation solution method of voltage and reactive power optimization of a distribution network. An active distribution network reactive power optimization module is established by using reactive power outputs of a distributed power supply and a discrete reactive power regulating device in a distribution network as state variables and using the operation transmission loss of the distribution network as an objective function; linearization is carried out on an active distribution network reactive power optimization module to obtain a linear approximation model; and alternate iteration is carried out on a loaf flow analysis and the linear approximation model to solve a solution approximating an original non-convex problem. According to the invention, for the distribution network design with loop network operation, the reactive power regulation capability of the distributed power supply can be fully utilized to realize coordinated cooperation with other reactive-load compensation devices; over-voltage and under-voltage problems caused by grid connection of a distributed power supply can be solved; the operation losses of the distribution network can be reduced; the capability of the distribution network for absorbing the distributed power supply can be improved; the safe and economic operation of the distribution network can be guaranteed; and the model solution becomes simple and reliable and no non-feasible solution is generated.

Description

Technical field [0001] The invention relates to the field of optimized operation of electric power systems, in particular to a linear approximation solution method for voltage and reactive power optimization of distribution networks. Background technique [0002] Due to the intermittent and random nature of available energy sources, its large number of accesses will have a wide range of impacts on the distribution network, mainly in: changing the voltage level of the distribution network, increasing the short-circuit capacity of the distribution network, and relay protection strategies The complexity of the power supply increases, affects the reliability of the power supply of the network, and exacerbates the deterioration of power quality. At the same time, as the penetration rate of distributed power sources in the distribution network continues to increase, the traditional distribution network will gradually evolve into an active distribution network with many adjustable and c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 吴在军王洋徐怡悦窦晓波胡敏强
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com